Antiskid device



Jan. 6, 1931. JOHNSON 1,788,159

ANIISKID DEVICE Fil ed Apfil s, 1929 IF 1731A mmul) 7 X/Ww Patented Jan. 6, 1931 I '1 I I v v p g ,THEODOBEEMIL JOHNSON. oFnxnRInGE,'on'rnmojcAnAnA mimsxm m "This'inventionrelates-to improvements-m are two flatmetal, bars tapered 'to' one end anti-skiddevices for mo'torvehicles,'-as*deas n13: A caulk 15 is formed on each of scribedin thepresentspecification and illusthe bars "11 and 12at the endsoppesite'ure trated in th'e accompanyil g drawings which .taperedportion 13 by 'bendingsfaid bars as 5 form partof same-.1 i at 16*s0 thattheportions IGAJbeyond the 55'- The' nvention "consistsessentially m the bends 16 lie substantiallynormalto themain novel 'features pointed out broadly and body of the barsll and 1 2,'-"The"caulks"15 specifically in the claims for fnovelty folformedithere'by-extend aisuitable'distance." lowing adescriptioncontaining'an explanasay from onehalf to one inch; more or less,

tion in'fdetail or an acceptable101111 01? the, according to the size of the tire for which" 69;

inventioni f 5 the device'is intended. The'caulks'15 "are Theobjects of the inventionare to ensure sharpened as at 17 to allow them to; pene a' positive grip on pavement or hard roads, trateice or the 'likeythereby affording a especially whencovered-1with ice or snow.f positive traction on slippery surfaces. The

thereby'preventing"skiddingFand accidents 'bars lljand 12are slightly curved through} 6f and loss of time when. driving on icy reads] out theirflength' as-atj18to allow aprope'r] or pavements; to reduce unnel-vs strain bearing on the peripheryof thetirens best when driving 1on slipperyfor icy roads my shown'in Figure 5, andare jadaptedto bean: pavements'ftoprevent losspf time'in'the on or" overlap each other, illustrated in 20 transportation of goods by means of niotor. Figure 1,111 such manner that'the tapered 210 vehicles. especially when" the condition of ends13'willjbespaced'a shortdis'tancefrom the" roads isfIsu'ch"thatlordinary 'nonskid thecaulks-15. "Each ofthe bars 11 and 12" chains and the like *dq not" a fiordqthe proper are tapered throughout the overlapped poi" traction; 't'o'eonstrimt, "an anti-skid deviee, tion's so that the total'thieknessof thetwo that may be readily attached'tolthe'ordinary bars at the overlap is ap-proxin'iately the is tire "chain or to theiriin of" the wheel; to thickness of the remaining portion of said construct such an anti skid, devicein which] bars 11 and 12. f j the different-parts may be-readilyreplaced rectangular opening 20 is formed in each or sharpenedand that will not cause-ezcesof saiclbarsll and 12 and along the longitue0 sive chafing or'wearing o'nfthe' tires and dinal axis thereof andgso situated that-when Se clo ging'withsnowand'the-like; and genth -Hand 12 are o'verla'pped,saidopenerally to provide a device of this description, 111gs'20 will coincide and be spacedan equal" economical of manufacture and capable of distance from the caulks15 A'key 21 subaccomplishing the aforesaid results and pun stantiallyrectangular in cross section and poses. I i g having the head- 22'is adapted'to be inserted 8;;

In the drawings, Figure 1 is a side elethrough the 'openings 2O tolock-the bars 11 vational View of the invention. and 12- in their, overlapped position. The

Figure 2 is a plan view of Figure 1. openings 20 are slightly larger than the key Figure 3 is an elevational vview of a part 21 so that the bars 11 and 12 will not beheld 4.0 of the the invention. 1 too rigidly; fAn' opening23 is formed in the Figure 4 is an end elevational view of key 21, "spaced from the" head 22a distance Figure 1. i t slightly greater than the'thickness of the Figure 5 is aside elevational view' showoverlapped bars A cotter key 24por some ing one method of installation. I 1 other suitable lockingpinmay be inserted Figure 6 is a perspective view of a slightthrough the'opening 23 and bent'orriveted'to ly modified form of this invention. retain the key 21in its operative position an d Like numerals of reference indicate corthe bars 1 1"and 12 in place. The key 2k is responding parts in the various figures. extended beyond the opening 23 to f form a Referring to the drawings, the numeral caulk 25 at right an'gle's to g'theca'ulks :15. 10 indicates the device complete. 11 and 12 The caulk 25 is sharpened at its extremity tov -30 ingpn' tire: andis rounded ongits bearing- 12 approximately the same distance as-do the caulks 15.

F lat straps '27 having rectangular openings 28 therethrough of a slightly greater. area than the cross sectional area of the bars 11 and'12 adjacentthe'caulks 1'5,are1 jnounted at said openings 28 on respective bars 11 and Y12 before assembling the device, and are v be: of methodsrby wliich'devices might be secured to a Wheel, such as by means of t'liens;'ua-l-tire chains, but it is not mypurpose assembled; Holes 29 arehformedateach end j through the straps 27, marrow-a chain or positioned adjacent the walks 15 The caulks 15 and the ends 13 prevent the cstraps from becoming displaced after the device-is hook to be secured to said straps.

1 lfgdesiredg tlie straps V be forguedv to or forrned integral with; the/ bars l1 and 12, but -'I find thatthisfslightly reduces the;

flxibna r the device-"and causes Wear on the tires-at this point. The head, 22 is made a sufficiently large to provideaawproper bearsurface on; said tires to prevent excessive Wear: a a I In the operation of this inventiom'tl e device' may ,beasecured to theordinary. tire chains by short lengths of chain connected at Qneendito: the tire chains and at the. other to=the straps '27 at'thea openings 29.

The-deviee lQis arranged on the tire insuch 7 v s A be'engaged byichainlengths.

a -pair. of bars amanner that the 'caulks 15' will be normal to the directien otit favel ofltheve'hicle and the caulks-251will be inline withfthe Wheel.

' Thedeviceofi course'is arrangedon the :face

of the tire where itvvill-have the best tracor 12 from the straps=27 In: most cases-it is found advisable to use a plurality of these anti-skid devic'eson each similarly situated, may either be formed integral with the bar 32 as at 36 or secured to said bar through an opening similar to the opening in Figure 2by means of a cotter or'lockingpin. Extensions 38 are formed adjacent each end'at each side of the bar 32.

and have an opening 39 formed therethrough 7 to'allovv fortlie securing of, a fasteniii ffchain or clip thereto, similar to the clips It'isto be noted that there are a great nunito'claii'n such methods as being original and patentab'leas tl'feyare' well known to the art. Hovvever, I believe that a device constructed; substantially as shown is broadly novel and althoughthe constructional de tails might v be changed considerably, would still fall within the: scope of. thi'srin vention as setiorth and claimedlin the fol forming gripping members, eachhof sai dr traction I members being formed oi two, bars having oppositely tapered overlapping; faces and securedtogether by a central, caulk pass:

ing through said barsiand, secured by apin,

andsuitablebracketeon said bar s adapted to In an anti-skidldvice, forming traction members having, caulks formed on their ends and oppositely tapering overlapping faces secured together centrally bya removable rectangular caulkpassing through holes provided. in said bars and: se

cured therein by a pin, fiat-bracketsencircling said bars at either e'ndhavin g arr-plurality; of; holes adapted to receivefshort. lengths of,

chainextending radially from chains at either sideof saidltraction members a v Signed at the city of Toronto, this; 12th dayofaMarch, 1929.

wheel and especially on the driving Wheels. 7 7

Suitable clips may be secured to the felloe or rim ofthe vehicle wheel and the r anti-skid 7 devices detachably secured-by means of chains or thelike tosaid'clipsinstead'of securimgjtheni'to the tire-zchains-if it is so desired.

In Figure 6, I she-W a slightly' mo'dified 7 form of thel'HV8Htl0I-1'.,II1Stea;doftwo sepa-;

rate bars 11- and 12 overlapping each. other, I form'the two bars integral, asat- 32. vThe end: caulks- 33 are similar to the: cauIks-V' l5:

showfi in Figure-'1 and are formed by bend- V ing'the'bar32 as at 34 adjacent each end to formsaid caulk'sor lugs 33. The cau-llzs r are sharpened atthe points 'asat lTsimilar to those-in the former case. VA caulk 85, simi- 

